In: Biology
Smooth seeds (S) are completely dominant over wrinkled seeds (s). You cross a plant that is homozygous for smooth seeds (male) with a plant that is heterozygous for smooth seeds (female). Use a Punnett square to determine the expected genotypic and phenotypic ratios for the offspring.
What are the male plant's gametes?
What are the female plant's gametes?
What is the expected genotypic ratio of the offspring?
What is the phenotypic ratio of the offspring?
What is the female plant's genotype?
Male plant's gametes: SS
Female plant's gametes: Ss
SS X Ss
S |
s |
|
S |
SS Homozygous smooth seeds |
Ss Heterozygous smooth seeds |
S |
SS Homozygous smooth seeds |
Ss Heterozygous smooth seeds |
The expected genotypic ratio of the offspring is 1 (Homozygous smooth seeds) : 1 (Heterozygous smooth seeds).
All the offspring’s phenotype will be with smooth seeds.
Ss